The invention discloses an environmental-protection-equipment control device easy to use. The environmental-protection-equipment control device easy to use comprises a fixed plate, and a glass cylinder and three controllers are arranged on the fixed plate. When the environmental-protection-equipment control device easy to use is used, as moving of piston can well clean the inner wall of the glasscylinder, the possible influence when hydrargyrum is impure on the inner cavity wall of the glass cylinder is avoided, and then no matter when the control device is located at any angle, the influenceon expansion and shrinkage of the hydrargyrum and moving of the piston in the glass cylinder can be avoided. Meanwhile, no matter when the controllers are located at any angle, metal clamping pits and metal protruding blocks in the controllers can keep good connection, the environmental-protection-equipment control device is easy to use accordingly, and the requirement for the environment is low.