The invention relates to a method for producing PODE (polyoxymethylene dimethyl ethers) through paraformaldehyde, and mainly solves the problem that a catalyst is low in reaction efficiency and the cost is relatively high as trioxymethylene is adopted as the raw material in the prior art. With methyl alcohol, methylal and paraformaldehyde as the raw materials, the method comprises the step of enabling the raw materials to be in contact with a catalyst for reaction at the temperature of 70-200 DEG C and the reaction pressure of 0.2-6 MPa, so as to generate PODE, wherein the mass ratio of methyl alcohol to methylal to paraformaldehyde is (0-10): (0-10): 1; the dosages of methyl alcohol and methylal cannot be 0 at the same time; the dosage of the catalyst is 0.05-10% of the weight of the raw materials; the used catalyst comprises the following components in parts by weight: a) 30-80 parts of a CMPs (conjugated microporous polymers) carrier, and b) 20-70 parts of solid super acid. Through the adoption of the technical scheme, the problem is well solved, and the method can be applied to industrial production of PODE.