In this paper I have seen some basics of nuclear reaction,Basically include in the intro-rnduction part starting from Rutherford experiment to the modern accelerating machinernnuclear reactions.In the second chapter of this paper brierny describe about de nition ofrnnuclear reaction and also disscused about conservation laws that including Energeticsrnconservation of linear momentum,other conservation laws and Isospin.Finally in the lastrnchapter I have seen types of nuclear reaction i.e,compound,direct,resonance and heavy-ionrnnuclear reaction and also nuclear cross-section