Explain that how uneven heating between equator and the poles generate wind current?

You are correct to point the reasons behind wind current. The uneven heating between land and water & poles and equator leads to difference in temperature of air(hot and cold) which is responsible for the wind current or air movement. A lower pressure develops at the equator while a higher pressure exists at the poles. Winds move from region of high pressures (poles) to regions of low pressure (equator).