The invention relates to rattrap tools, in particular to a sensitivity-adjustable rattrap without a special trigger. The rattrap comprises an upper clamping part, a lower clamping part, a clamping shaft and springs and is characterized in that one end of each spring is fixed to the upper clamping part while the other end is fixed to the lower clamping part, and two ends of each spring and the clamping shaft are in a linear or triangular positional relation. Compared with an existing rattrap, the sensitivity-adjustable rattrap without the special trigger has advantages that (1) due to lack of the special trigger, precaution of rats on the rattrap can be lowered, and accordingly rat trap probability is increased; (2), due to adding of a sensitivity adjusting function, the rat trap performance of the rattrap is improved, the trap rate is increased, and rat trap size controllability is realized. In addition, the rattrap also has advantages that structural simplicity and easiness in operation are realized, production cost is reduced, and the rattrap is easy to enter the market and close to the consumption level of people.