The mixing uniformity and processing safety of widely used zirconium/lead tetroxide （Zr/Pb₃O₄） composites are indispensable. In the current paper， a Zr/Pb₃O₄ microcapsule bonded with the adhesive alginate was prepared by crosslinking the liquid phase with sodium alginate（SA） and Ca²⁺ in aqueous phase to form calcium alginate （CA） gel. The morphology， particle size， sphericity， fluidity and apparent density of CA/Zr/Pb₃O₄ microcapsules and the traditional-made NC/Zr/Pb₃O₄ controlled sample were evaluated. The average particle size， variance， sphericity and repose angle of CA/Zr/Pb₃O₄ microcapsules is measured to 517.10 μm， 44.21 μm， 0.90， and 27.44°， respectively. The flame sensitivity， burning rate， flame length and sensitivity of CA/Zr/Pb₃O₄ microcapsules were tested to 65.38 mm， which was lower than that of Zr/Pb₃O₄ powder （81.83 mm）. Besides， the combustion rate deviation of CA/Zr/Pb₃O₄ microcapsules and Zr/Pb₃O₄ powder is 6.86 and 12.04， respectively， implying an excellent combustion consistency. Furthermore， much more flame length of 17.1 mm and burning particles than Zr/Pb₃O₄ were obtained in of CA/Zr/Pb₃O₄ microcapsules. In addition， a reduced the electrostatic sensitivity of CA/Zr/Pb₃O₄ microcapsules （156.25 mJ） and Zr/Pb₃O₄ powder （0.71 mJ） were realized. More importantly， the water-phase preparation carried out in the current paper may pave a high-safety and universal way for a variety of pyrotechnic agents.