Leakage-proof marking pen with double-bead structure

A liquid leakage prevention marking pen with a double-bead structure comprises a pen holder, a plug is arranged at one end of the pen holder, a double-bead liquid outlet structure is arranged at the other end of the pen holder, and ink is stored in the pen holder. The double-bead liquid outlet structure comprises a support arranged in the pen holder, an ink flowing hole is formed in the support, a bead limiting rod is arranged on the side, facing the writing end, of the support, a first bead is arranged at the outer end of the bead limiting rod, a second bead abuts against the outer side of the first bead, the second bead is limited in a limiting opening in the writing end, the first bead abuts against a pressure spring, and the pressure spring abuts against the pressure spring. And a gap is reserved between the first bead and the bead limiting rod. The liquid leakage prevention marking pen with the double-bead structure is simple and compact in overall structure, low in cost, good in writing experience due t