We consider two force-free current loops, as proposed by Gold and Hoyl
e (1960), as the initial current loops, to investigate two types of th
e magnetic reconnection process, the partial and complete reconnection
s during coalescence of these loops, by using a 3-D resistive MI-ID co
de. It is shown that two plasmoids can be produced on both sides of th
e coalescence area by both types of the magnetic reconnection process
during coalescence of two current loops. It is also shown that strong
fast magnetosonic waves can be induced in the partial reconnection cas
e of two-current-loop collision. When two current loops collide locall
y at two points, four plasmoids can be produced and two of these plasm
oids merge into one.