If a child recives ssi does that affect child support payments I just reAlly want to no will he still receive child support?

SSI is welfare, so it's income based. Your child support is part of that income, and must be reported when applying for SSI.
Whether or not your child support will go down based on an increase in your income (SSI) is up to the court that awarded child support. And your ex can file for a change, if your support isn't based just on a state determined amount based on his income.

Each state, and sometimes various child support agreements have complicated systems to figure payment.

Some use income of both custodial and non custodial parent, In some places only the income of the non custodial parent is used.
Along with number of days child is with each parent.

So it will depend largely on how the support is calculated on your child support agreement