My 20 months toddler have strange behaviour. She enjoy attention but if someone try to pick her she cry. She don't want to play with other childrem also. If she go herself to other childer then she will play with them but if someone come to her she just started crying.

Many children r like this, do you or anyone else hold her a lot? I know both my kids were like that, if anyone else tried to pick them up then they would scream

No we r not holding her too much. She love to play alone also.

It is normal for kids around that age to cry when being picked up.
Often it is when they are really attached to mommy or daddy.
My son didn't like bothering with other kids. He turned out okay.
When he was 4 and in daycare he would play with the toys in the opposite corner from everybody else while they had storytime. While they were playing with the toys he was in the kitchen helping cook lunch for the other kids.
Let her learn to socialize at her own pace but at the same time encourage her to socialize.

How can we help her to socialize.

Do u have friends or family with other children around the same age?

s. I have. In-fact in my neighborhood one toddler just 2 month younger then her is so free. He is every time laughing and have no fear from anything just opposite to my baby. I can't understand where I am going wrong.

Its not you that is going wrong, my children were like this as well and grew out of it!

Children have different temperaments and behaviors. Some are shy, some get mad quickly, some cry a lot, some just sit and watch what's happening around them.

At this age until about age 4 or 5, children do what is called "parallel play." That means each plays with toys alone but are willing to be in the same room with another child or children who may also be doing parallel play. Around age 4, children begin to interact when they play and will play together to build a house with blocks or draw pictures together or throw a ball back and forth.

Ask a friend who also has a toddler to cooperate with you and your toddler. Play simple games. Sit your toddler on the floor between your legs and ask your friend to sit with her baby between her legs. Sit about 3 feet apart and slowly roll a big ball to each other. The toddlers won't know what to do, so the mothers will have to put the toddlers' hands on the ball and show them how to push the ball back and forth to each other. Show much excitement while doing this.

Do the same thing building a house with blocks. Another mother and toddler should "help".

Playing with toys while sitting on the floor is probably the best way to do this. And the mothers must be there. The toddlers will learn how to socialize because the mothers are showing them how. The toddlers will not learn while playing alone without the mothers.

Start teaching social skills with only one other toddler (and the toddler's mother). If you know other mothers of small children, switch to another mother and toddler, so your child plays with other children. Remember, do this with only one toddler and mother at a time.

Thanks for your Valuable suggestion

Yeah little kids have their personality just like anybody so it isn't that you are doing anything wrong. He will out grow it.